1、玻璃槽口中构造上的螺钉头未处理好，玻璃与螺钉头接触处一点受力，造成玻璃裂纹。安装玻璃的槽口翘曲不平，致使玻璃受力不均匀而碎裂。

1, a glass screw head structure is not good, the glass and the screw head at the contact point of the stress caused by the glass crack. Is the installation of glass warpage, resulting in uneven stress and broken glass.

2、裁割玻璃尺寸偏大，镶嵌时未用橡胶垫块，当玻璃受热膨胀时，边缘与肯德基门型材槽口直接接触受力而产生裂纹。裁割玻璃不齐，用钳子掰边时玻璃边已形成肉眼看不见的细纹，在门使用过程中稍受震动，细纹就逐渐增大。

2, cut the glass mosaic size is too large, not with rubber pads, when the glass is heated to expand, and the edge of Kentucky door profiles direct contact stress and notch crack. Cut the glass not neat, with a pair of pliers severing the glass edge has become invisible to the naked eye fine lines, the door in the process of using a little vibration, fine lines gradually increased.

预防方法：裁割玻璃需尺寸准确，边沿整齐。安装玻璃时必须用弹性垫块，不得使用木块等当垫块。安装玻璃前应先检查槽口，如发现翘曲不平或螺钉露头，应处理至符合要求后再镶嵌玻璃。

Preventive methods: cut the glass to be accurate in size, edge in order. The glass is installed must use elastic pad, etc. when the pad blocks shall not be used. The installation of the glass before the inspection found such as notch, warp or screw outcrop, should be treated to meet the requirements after the glass mosaic.

处理方法：对肯德基门上已有裂纹的玻璃应予以换。卸下有裂纹的玻璃后，应先查明造成裂纹的原因，并采取针对性措施后，再重新换装玻璃。

Processing method: the glass on the door of the KFC should be replaced. The glass cracked after discharge, should be to identify the cause of crack, and take corresponding measures, and to dress up the glass.